EP1525652A2 - Anordnung zum inhärenten störlichtbogenschutz in photovoltaik-anlagen - Google Patents
Anordnung zum inhärenten störlichtbogenschutz in photovoltaik-anlagenInfo
- Publication number
- EP1525652A2 EP1525652A2 EP03764991A EP03764991A EP1525652A2 EP 1525652 A2 EP1525652 A2 EP 1525652A2 EP 03764991 A EP03764991 A EP 03764991A EP 03764991 A EP03764991 A EP 03764991A EP 1525652 A2 EP1525652 A2 EP 1525652A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- network
- storage devices
- arcing
- electrical
- arrangement according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000009434 installation Methods 0.000 title abstract description 6
- 239000003990 capacitor Substances 0.000 claims abstract description 3
- 230000000368 destabilizing effect Effects 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Definitions
- the invention relates to an arrangement for inherent arcing protection in the electrical direct current network of photovoltaic systems.
- sparks or arcing faults can occur at sufficiently high voltages and currents between the contacts. Unlike with alternating voltages, where the arcing normally goes out at the next zero crossing of the voltage wave due to the change in polarity, there is a risk under dc voltage conditions that the arcing fault is maintained for a long time and leads to considerable damage to the contact points and possibly the surrounding elements. Such arcing faults must therefore be recognized and switched off for fire protection reasons.
- circuit arrangements and / or modules are known from the prior art which extinguish a previously detected arcing fault by disconnecting current paths or by creating additional current paths (reactive arcing protection).
- Switching devices located in the operating circuit (circuit breakers, load switches, residual current circuit breakers, circuit breakers or short-circuiting devices, top switches) receive external excitation from a fault detection unit (arcing fault detector).
- arc detection unit arc detection unit
- US Pat. No. 5,185,687 discloses an arc detection arrangement which uses a field sensor to detect an electromagnetic field which is emitted by a Arcing is generated.
- the location of the probable occurrence of the arcing fault must be known beforehand.
- modulation switches are used to switch off operating and fault currents, in which the zero current crossings are forced by an oscillating circuit above the electrical contacts. Furthermore, solutions are known which reduce the spark formation over individual switch contacts by using additional parallel capacitances to the contacts. The concepts with modulation switches and capacities above the switch contacts for arc quenching are only effective as a result. It is important to ensure that the arc is extinguished in the switchgear or on the contact pair.
- an arc protection device was developed that takes advantage of the voltage drop of more than 10 V caused by the arc.
- the main deficiency of this arc protection device lies in the fact that, depending on the network structure, many measuring devices have to be used and the associated information has to be continuously evaluated. If this is not done, not all possible errors are recorded.
- the object of the invention is therefore to provide an arrangement for permanently effective arc protection in electrical direct current networks of photovoltaic systems which does not require sensitive arc detection.
- the invention is based on the knowledge that the conditions of existence of the arcing fault are determined by the feeding network and that a stable burning arcing fault cannot occur at ideal voltage sources. While an arcing fault always burns at its ideal operating point at an ideal power source, an ideal voltage source always leads to an unstable operating point, so that the arc is not popular. Therefore, by supplementing the direct current network or some of its components with electrical energy stores, the conditions of existence for an emerging or existing arc can deteriorate because the electrical energy stores, for example capacitors, act briefly like voltage sources.
- the invention thus proposes the installation of one or more capacitive electrical stores in the direct current network of the photovoltaic system in order to avoid an arcing fault.
- a capacitance connected in parallel to the arcing fault acts like an ideal voltage source for short periods.
- the installation of an electrical capacity is technically very easy to implement.
- the expected financial outlay is correspondingly low.
- no reaction time is required for the protection.
- the DC system is or is inherently arc-proof. To prevent accidental arcing, the detection of the type of fault (longitudinal or transverse faults) and the fault location in the DC network is no longer necessary when the invention is used. No switching devices are required to implement the protective effect.
- the general condition for the effectiveness of the protective measure according to the invention is that the time constant of the network ⁇ NW must be greater than the thermal time constant of the arcing fault ⁇ L B; the following therefore applies: ⁇ NW > ⁇ L B •
- FIG. 1 shows a basic circuit of a directly coupled solar generator with the electrical load and an electrical storage device directly at the load;
- FIG. 2 shows a basic circuit using storage devices in parallel with each module and a further storage device in parallel with the electrical load
- Fig. 3 shows a basic circuit using memory devices in parallel to each module and memory devices at the beginning and end of each outer conductor of the DC main line.
- 1 shows a basic electrical circuit of a directly electrically coupled solar generator with an electrical load 1.
- Several solar modules 2 are electrically connected in series to form a string.
- a global electrical storage device 3 is connected in the network directly electrically in front of and parallel to the load 1 in the circuit.
- Fig. 2 shows a basic electrical circuit of a modified DC network, which consists of several strings connected in parallel.
- each solar module 2 is assigned its own appropriately dimensioned local electrical storage device 4, i.e. electrically connected in parallel.
- Analogously to the circuit shown in FIG. 1, the correspondingly dimensioned global storage device 3 in the network is switched on immediately before and parallel to the electrical load 1 in the network.
- each solar module 2 is assigned its local electrical storage device 4.
- An additional global storage device has been omitted here.
- Other embodiments are easily conceivable. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10233119 | 2002-07-20 | ||
| DE10233119 | 2002-07-20 | ||
| PCT/EP2003/007644 WO2004010556A2 (de) | 2002-07-20 | 2003-07-15 | Anordnung zum inhärenten störlichtbogenschutz in photovoltaik-anlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1525652A2 true EP1525652A2 (de) | 2005-04-27 |
Family
ID=30469022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03764991A Withdrawn EP1525652A2 (de) | 2002-07-20 | 2003-07-15 | Anordnung zum inhärenten störlichtbogenschutz in photovoltaik-anlagen |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1525652A2 (de) |
| AU (1) | AU2003258511A1 (de) |
| WO (1) | WO2004010556A2 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2347958B1 (de) * | 2008-11-12 | 2018-09-05 | Kyushu Institute of Technology | Vorrichtung zur unterdrückung langfristiger entladungen in einer solarbatterie-anordnung |
| DE102009044695A1 (de) | 2009-11-27 | 2011-06-01 | Müller, Ingo, Dr. | Solarmodul, Modulschalter, Solarkabel, Sammelschiene, Mehrfachkontakt-Steckverbinder |
| US9897642B1 (en) | 2014-03-27 | 2018-02-20 | National Technology & Engineering Solutions Of Sandia, Llc | Detection of arcing location on photovoltaic systems using filters |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995025374A1 (de) * | 1994-03-16 | 1995-09-21 | Alpha Real Ag | Verfahren zum schutz einer elektrischen anlage, insbesondere einer gleichspannungs-, z.b. einer photovoltaik-anlage, anlage sowie detektionseinheit für die anlage |
| JPH0916277A (ja) * | 1995-04-24 | 1997-01-17 | Canon Inc | 太陽電池を有する直流電源システムおよびその動作方法 |
-
2003
- 2003-07-15 WO PCT/EP2003/007644 patent/WO2004010556A2/de not_active Ceased
- 2003-07-15 AU AU2003258511A patent/AU2003258511A1/en not_active Abandoned
- 2003-07-15 EP EP03764991A patent/EP1525652A2/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004010556A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004010556A3 (de) | 2004-04-08 |
| WO2004010556A2 (de) | 2004-01-29 |
| AU2003258511A8 (en) | 2004-02-09 |
| AU2003258511A1 (en) | 2004-02-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20050221 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KOERNER, MICHAEL Inventor name: MUELLER, INGO Inventor name: HAUSCHILD, HORST |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20070201 |